Hoist.



No. 771,108. PATENTBD SEPT. 27, 1904. S. T. WALLACE.

HOIST.

APPLIOATION FILED DBO. 11, 1903.

No MODEL. n 3

'mlm .n m. u Hmm Il Illlllllllllllllllllllllill @y Ma No. 771,108.PATENTED SEPT. 27, 1904. S. T. WALLACE.

Holsr. APPLICATION FILED DEU. 11, 1903.

-N0 MODEL. 3 SHEETS-SHEET 2.

WITNESS/5S.' /NVENTOH 4 TTOHNE YS No. 771,108. f PATBNTED SEPT. 27,1904.

S. T. WALLACE.

HOIST.

APPLIOATION FILED D110. 11, 1903.

N0 MODEL. 3 SHEETS-SHEET 3.

i fastened in UNITED STATES Patented September 27, 1904.

PATENT OFFICE.

HolsT.

SPECIFICATION forming part of Letters Patent No. 771,108, datedSeptember 27', 1904. Application led December l1, 1903. Serial No.184,736. (No model.)

To all whom, t may concern:

Be it known that I, SAMUEL THOMAS VVALf LACE, a citizen of the UnitedStates, and a resident of Los Angeles, in the county of Los Angeles andState of California, have invented a new and Improved Hoist, of whichthe following is a full, clear, and exact description.

This invention relates to a hoist intended especially for use in theconstruction of buildings to hoist building materials from one floor toanother.

This specification is an exact description of one example of myinvention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a perspective view showing the invention in use. Fig. 2 is aside elevation illustrating the carriage in discharging position. Fig. 3is a sectional view of the same parts in the same position. Fig. 4 is afront elevation of the carriage. Fig. 5 is a rear elevation thereof.Fig. 6 is a plan view. Fig. 7 is a front view of the upper part of thetrack, showing a modification. Fig. 8 is a plan of the same,illustrating also the carriage; and Fig. 9 is sectional elevation online 9 9 in Fig. 7

10 indicates the tracks of the hoist, which are formed of T-iron and arebraced together by suitable cross-bars 11.

12 indicates braces which extend out diagonally from the tracks toassist in holding them, and at their upper ends the tracks are providedwith laterally-extending downwardlyinclined sections 14. As the buildingis advanced in height new sections of track are place, and thedownwardly-inclined discharging-sections'14 are arranged to bear uponthe upper ioor of the building. For example, Fig. 1 I have indicatedthat the iirst two stories of the building have been framed and that theelevator is adjusted for hoisting the building material to be used inthe construction of the third story.

The carriage comprises two side portions 15, connected by suitablecross-braces 16 and carrying rollers 17, which bear on the face of thetracks, as shown, Suitably mounted at the rear of the body of thecarriage are rollers 18, which bear on the rear faces of the tracks, andin this manner the body of the carriage is held securely. Below therollers 18 inwardly-extending guide-lugs 19 are fastened to thecarriage, these lugs engaging the rear sides of the tracks and assistingthe rollers 18 in holding the carriage to slide on the tracks. The sideportions of the carriage-body are provided with outwardly and upwardlyprojecting struts 20, forming the platform of the carriage, and providedwith antifriction-rollers 21, so that the load may be readily rolleddownward off of the said platform, as will be hereinafter fully setforth. Mounted at theupper end of each of the side portions 15 of thebody of the carriage is a swinging arm 22. These arms are pivoted toswing from the position shown in Fig. 1 to that shown in Figs. 2 and 3.When the carriage is below the upper ends of the tracks, the said arms22 stand vertically against the tracks, and the load, as indicated bythe broken lines in Fig. 1, rests on the platform of the crrriage andagainst the arms 22. The instant the carriage assumes the position shownin Figs. 2 and 3 the weight of the load will throw the arms 22 downwardto the position shown in said view, and the load will then run on of thecarriage onto the inclined portions 14 of the tracks. The arms 22 areprovided with antifriction-rollers 23, which not only reduce thefriction between the arms and tracks during the movement of thecarriage, but also enable the load to run easily oif of the arms whenthe arms drop, as shown in Figs. 2 and 3. 'Ihe carriage may be mountedin any desired manner. I prefer to employ -a rope or cable 24, which isattached to the carriage and passes over a sheave 25 at the top of thetrack, thence downward around an idler-sheave 26 at the base of thetrack, and from this sheave to the source of power, which obviously maybe of any sort desired.

The manner of using the invention will, it is thought, be apparent fromthe foregoing description, and it will be seen that by means of thisarrangement building materials of all sorts may be readily elevated anddischarged.

IOO

As fast as the building increases in height the tracks 10 should belengthened by fastening additional sections thereto. The hoist liesoutside of the building and in practice will be erected on the sidewalkimmediately in front of the building, so that it will occupy very littlespace. By arranging the hoist in this manner it may be used to elevatebeams of a length too great for elevation through the interior of thebuilding.

In order to prevent damage to the track or carriage, due to a heavyshock as the carriage strikes the top part of the track, I employ thearrangement shown in Figs. 7 8, and 9. This consists in arranging' oneor more springs 30 so that they will be compressed as the carriagereaches its uppermost position and thus serve as a yielding bumper tostop the carriage. As shown in Figs. 7, 8, and 9, the springs aremounted on the tracks 10 and have studs 32 connected therewith, thesestuds being arranged to be struck by studs 34 on the carriage, therebybringing about the result above referred to.

Various changes in the form, proportions, and minor details of myinvention may be resorted to at will without departing from the spiritand scope thereof. Hence I consider myself entitled to all suchvariations as may lie within the intent of my claims.

I-Iaving thus described my invention, I claim as new and desire tosecure by Letters Patent- 1. The combination of a track, acarriagearranged to run thereon, a spring mounted on the track, a stud connectedwith the spring and extending laterally therefrom, and a lateral studcarried by the carriage and arranged to strike the stud of the spring,for the purpose specified.

2. The combination of two tracks, an elevator mounted to run thereon,the elevator comprising a body and a platform, two arms pivoted at theupper end of the body and respectively running on the tracks, and meansfor operating the elevator.

3. The combination of two tracks, an elevator comprising a body runningon the tracks and a platform at the upper end of the body, two armspivotally mounted on the body and running respectively on the tracks,and an antifriction-roller mounted in each arm.

4C. The combination of two tracks, an elevator comprising a body runningon the tracks and a platform at the upper end of the body, two armspivotally mounted on the body and running respectively on the tracks, anvantifriction-roller mounted in each arm, and lateral track-sections atthe upper ends of the tracks, said sections being adapted to have thearms thrown down thereon as the carrier reaches its uppermost position.

5. The combination of a vertically-disposed track having alaterally-disposed extension at its upper end, a carriage mounted to runon the track, said carriage including a laterallydisposed platform, andan arm pivoted at the inner portion of said platform and adapted to runon the track, said arm being capable of falling down on the saidextension of the track as the carriage reaches its uppermost position.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SAMUEL THOMAS WALLACE.

Witnesses:

INILLIAM F. BLOECHER, WV. L. EWING.

